Ferromagnetism in colloidal Mn(super 2+)-doped ZnO nanocrystals

Article Abstract:

Nanocrystals of Zn(sub (1-x))Mn(sub x)O were produced using a novel colloidal chemistry technique. The manganese ions primarily substitute zinc ions in the hexagonal ZnO lattice, and part of them are ferromagnetically coupled up to room temperature even in isolated noninteracting nanocrystals and the rest of ions are magnetically disordered or uncoupled and the study highlights the advantages of working with noninteracting single domain particles of these intriguing materials.

Ferromagnetism, Magnetic properties, Zinc oxide, Colloid chemistry

---

Hydrothermal synthesis and pseudocapacitance properties of MnO(sub 2) nanostructures

Article Abstract:

The effect of varying the hydrothermal time to synthesis manganese oxide (MnO(sub 2)) nanostructures was investigated along with their influence on structural, morphological, compositional and electrochemical properties in supercapacitor electrode materials. MnO(sub 2) nanostructure prepared hydrothermally at 140 degree C for 6 h showed the best performance with the specific capacitance of 168 F/g when cycled at a constant current of 200 mA/g.

Capacitance

---

Fractionation of multiwalled carbon nanotubes by cascade membrane microfiltration

Article Abstract:

The fractionation of multiwalled carbon nanotubes (MWNT) is investigated. MWNT were purified and size-separated via a multistep microfiltration method which uses membranes of varying pore sizes. Analysis of membrane surface and permeate suspension deposits using scanning electron and atomic force microscopy showed that the samples were separated during the filtration. The fractionation of the MWNT by length was also verified.

Research, Carbon, Membrane separation

Similar abstracts:

• Abstracts: Individual and collective electronic properties of Ag nanocrystals. Use of luminescence of europeium ions for the study of the interaction of polyelectrolyte hydrogels with multivalent cations
• Abstracts: In situ one-pot synthesis of 1-dimensional transition metal oxide nanocrystals. An in situ force microscopy study of uric acid crystals growth
• Abstracts: Thermochromatism and structural evolution of metastable polydiacetylenic crystals. How good is Langevin
• Abstracts: Thermodynamic scaling of diffusion in supercooled Lennard-Jones liquids. Thermodynamics in phase transitions in a fluid confined by a harmonic trap
• Abstracts: Electronic and structural shell closure in AgCu and AuCu nanoclusters

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.